Impossible to share the list

[RicXXX]

Hi Florian,
since more then a week, I'm unable to connect to the server with other devices using the same account (syncronization only works with my mobile, Samsung S8).
API server is https://quiet-meadow-29523.herokuapp.com

With my wife mobile (samsung S7), and with my Asus Zenpad i'm unable to connect. I've uninstalled the app several times, checked the server url, user and password but no connection.
I noticed it is able to retrieve the name of the location that I choose, but then it is unable to retrieve the items list and always come out the server error message.

Instead to login with the same account on other devices, I've also tried to share the location with another account, but this option does not work and come out the server error message (tried to share the location from my mobile).

Thanks for any feedback
Ric